Yes, Brian, it's actually a really good question that we've done a lot of work to think about, both on the cost of goods sold and on SG&A, both have some real cost savings in there. Some of that's government funding and it goes away. But I think of it kind of as three different buckets. The first bucket is things that happen to every company in the world with health care costs of your self-insured going down and travel costs going down and other things that kind of affected everybody. And so obviously, we're the beneficiary of that. And my assumption is that in a post-pandemic world over some time horizon, those costs come back relatively quickly, six months, three months, a year, depending on how you look at it. The other costs are things that kind of – because of the crisis, because without leadership, it was lower for longer, we took some aggressive actions around taking costs out of the business, both on the SG&A side and on the OP side, we're looking at over time, looking at employee utilization, looking at leases, looking at facilities, shuttering facilities, shutting locations, being very aggressive about that. And I think – and my view on that is that we actually put some good tools in place to manage that more effectively. And those types of tools and that type of muscle doesn't go away and the moment we all get a shot in our arm. So I really do believe that over the longer horizon, both on the SG&A and on the cost side, there's margin expansion that we'll experience out of here, because the cost we took out and the actions we took, didn't affect sales. I mean, the sales force is there, and we're hopeful that when that recovers, we'll have an opportunity there to really leverage our cost structure and be more – be smarter about it and take some of the lessons we learned in this pandemic and apply it over the longer horizon. So what that exact number is of the $20 million stays and go, it's going to be hard to put a finger on, because there's a lot of offsets to that with bad debt and other things. But I think that over the long haul, there really is a lesson here that we've learned, and I think there's some real savings we'll get over the long horizon.